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CET Inc.
2.5.5 Mains & Branch Circuits Hall Effect CT wiring (sharing the same PMC-DP)
Figure 2-19 Mains & Branch Circuits Hall Effect CT wiring (sharing the same PMC-DP)
Note:
1.
It is important to wire the G Terminal on the Hall Effect CT for the Mains Input, the COM Terminal
on the Power Supply, the I- Terminal and the COM Terminal on the PMC-512-D.
2.5.6 Communications Wiring
The PMC-512-D provides two RS485 ports that support the Modbus RTU protocol. Up to 32 devices can
be connected on a RS485 bus. The overall length of the RS485 cable connecting all devices should not
exceed 1200m.
If the master station does not have a RS485 communications port, a RS232/RS485 or USB/RS485
converter with optical isolation and surge protection should be used.
The following figure illustrates the RS485 wiring for the PMC-512-D:
Figure 2-20 RS485 Connections on PMC-512-D